Sensitization of Yb3+ by Nd3+ emission in alkaline-earth chloro borate glasses for laser and fiber amplifier applications
Sensitization of Yb3+ by Nd3+ emission in alkaline-earth chloro borate glasses for laser and fiber amplifier applications
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DOI：
10.1016/j.jallcom.2018.08.270
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发表时间：
2019-01
影响因子：
6.2
通讯作者：
R. Talewar;Sk. Mahamuda;K. Swapna;A. S. Rao
中科院分区：
文献类型：
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作者：
R. Talewar;Sk. Mahamuda;K. Swapna;A. S. Rao
采用熔体淬冷法合成了稀土离子（Ln = Nd和Yb）掺杂的强近红外发光碱土氯硼酸盐（AECB）玻璃，并通过吸收光谱、光致发光激发光谱（PLE）、光致发光（PL）和PL衰减光谱进行了表征。在824 nm激发下，Nd ~（3+）离子在850-1450 nm范围内有较强的近红外发射。在585 nm激发下，Nd ~（3+）和Yb ~（3+）分别在883、1067和1340 nm处和980 nm处出现强的特征发射带。Yb ~（3+）的980 nm发射属于2F 5/2→ 2F 7/2跃迁。详细研究了Yb ~（3+）掺杂浓度对近红外发光、寿命和能量转移效率（η埃特）的影响。利用沿着施主衰减曲线的PL谱和PLE谱研究了Nd ~（3+）-Yb ~（3+）离子间的能量转移机制。结果表明，Nd ~（3+）离子在AECB玻璃中通过4f-4f跃迁对Yb ~（3+）离子进行敏化是可能的。Nd ~（3+）单掺和Nd ~（3+）-Yb ~（3+）共掺的AECB玻璃的发光特性表明它们适合作为Yb ~（3+）光纤激光系统的多泵浦通道光源。
Intense near-infrared emitting alkaline-earth chloro borate (AECB) glasses doped with Lanthanide (Ln) ions (Ln = Nd and Yb) were synthesized by conventional melt quenching technique and characterized with absorption, photoluminescence excitation (PLE), photoluminescence (PL) and PL decay spectral measurements. For Nd3+ion, intense NIR emission in the range 850–1450 nm was observed under 824 nm excitation. Intense and characteristic emission bands of Nd3+(at 883, 1067 and 1340 nm) and Yb3+(at 980 nm) were observed with 585 nm excitation. Yb3+emission at 980 nm is ascribed to2F5/2→2F7/2transition. The dependence of NIR emission, lifetime and the energy transfer efficiency (ηETE) with the concentration of Yb3+was investigated in detail. The PLE and PL spectra along with donor decay curves have been used to establish the energy transfer mechanism between Nd3+-Yb3+ions. The results indicate that the sensitization of Yb3+is possible via 4f-4f transition of Nd3+ions in AECB glasses. The luminescence properties of the Nd3+singly doped and Nd3+-Yb3+co-doped AECB glasses indicate their suitability as multiple pump channel sources for Yb3+fiber laser systems.